In Pictures: Bill and Hillary Clinton welcome grandson

Chelsea Clinton and Marc Mezvinsky just welcomed their second child and took to social media where they shared the first photos of their son, Aidan Clinton Mezvinsky.

"At 7:41 AM Saturday, our family and hearts expanded with Aidan's arrival," Chelsea shared on Twitter while holding her baby. "We are blessed."

Former President Bill Clinton also posted a photo online where he was seen meeting his grandson for what could be the very first time. "Aidan has made two dads very happy this Father's Day," he wrote. "Hillary and I are thrilled for Marc and Chelsea!"

Presidential aspirant, Hillary Clinton also shared the happy news on Twitter where she personally signed the post.

She is seen carrying their grandson and seated beside her husband, Bill.

"What a joy being with our new grandson, Aidan. So grateful.-H," she wrote.